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fix more fd <= 0 bugs

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This commit is contained in:
cinap_lenrek 2012-04-24 06:57:02 +02:00
parent 7e4d9a4bfa
commit 8562240e8c
4 changed files with 15 additions and 44 deletions
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32
sys/src/cmd/aux/gps/gpsfs.c
View file

@ -126,6 +126,7 @@ void setline(void);
int getonechar(vlong*);
void getline(char*, int, vlong*);
void putline(char*);
void rtcset(long t);
int gettime(Fix*);
int getzulu(char *, Fix*);
int getalt(char*, char*, Fix*);
@ -570,37 +571,6 @@ readraw(Req *r)
return nil;
}
void
rtcset(long t)
{
static int fd;
long r;
int n;
char buf[32];
if(fd <= 0 && (fd = open("#r/rtc", ORDWR)) < 0){
fprint(2, "Can't open #r/rtc: %r\n");
return;
}
n = read(fd, buf, sizeof buf - 1);
if(n <= 0){
fprint(2, "Can't read #r/rtc: %r\n");
return;
}
buf[n] = '\0';
r = strtol(buf, nil, 0);
if(r <= 0){
fprint(2, "ridiculous #r/rtc: %ld\n", r);
return;
}
if(r - t > 1 || t - r > 0){
seek(fd, 0, 0);
fprint(fd, "%ld", t);
fprint(2, "correcting #r/rtc: %ld → %ld\n", r, t);
}
seek(fd, 0, 0);
}
int
gettime(Fix *f){
/* Convert zulu time and date to Plan9 time(2) */

8
sys/src/cmd/aux/gps/util.c
View file

@ -142,15 +142,15 @@ strtopos(char *p, char **ep)
return pl;
}
static void
rtcset(long t) /* We may use this some day */
void
rtcset(long t)
{
static int fd;
static int fd = -1;
long r;
int n;
char buf[32];
if(fd <= 0 && (fd = open("#r/rtc", ORDWR)) < 0){
if(fd < 0 && (fd = open("#r/rtc", ORDWR)) < 0){
fprint(2, "Can't open #r/rtc: %r\n");
return;
}

12
sys/src/cmd/ndb/dnresolve.c
View file

@ -265,9 +265,9 @@ querydestroy(Query *qp)
{
queryck(qp);
/* leave udpfd open */
if (qp->tcpfd > 0)
if (qp->tcpfd >= 0)
close(qp->tcpfd);
if (qp->tcpctlfd > 0) {
if (qp->tcpctlfd >= 0) {
hangup(qp->tcpctlfd);
close(qp->tcpctlfd);
}
@ -666,7 +666,7 @@ readnet(Query *qp, int medium, uchar *ibuf, uvlong endms, uchar **replyp,
memset(srcip, 0, IPaddrlen);
alarm(ms);
if (medium == Udp)
if (qp->udpfd <= 0)
if (qp->udpfd < 0)
dnslog("readnet: qp->udpfd closed");
else {
len = read(qp->udpfd, ibuf, Udphdrsize+Maxudpin);
@ -683,7 +683,7 @@ readnet(Query *qp, int medium, uchar *ibuf, uvlong endms, uchar **replyp,
if (!qp->tcpset)
dnslog("readnet: tcp params not set");
fd = qp->tcpfd;
if (fd <= 0)
if (fd < 0)
dnslog("readnet: %s: tcp fd unset for dest %I",
qp->dp->name, qp->tcpip);
else if (readn(fd, lenbuf, 2) != 2) {
@ -1003,7 +1003,7 @@ mydnsquery(Query *qp, int medium, uchar *udppkt, int len)
}
close(nfd);
if (qp->udpfd <= 0)
if (qp->udpfd < 0)
dnslog("mydnsquery: qp->udpfd %d closed", qp->udpfd);
else {
if (write(qp->udpfd, udppkt, len+Udphdrsize) !=
@ -1353,7 +1353,7 @@ tcpquery(Query *qp, DNSmsg *mp, int depth, uchar *ibuf, uchar *obuf, int len,
if (xmitquery(qp, Tcp, depth, obuf, inns, len) < 0 ||
readreply(qp, Tcp, req, ibuf, mp, endms) < 0)
rv = -1;
if (qp->tcpfd > 0) {
if (qp->tcpfd >= 0) {
hangup(qp->tcpctlfd);
close(qp->tcpctlfd);
close(qp->tcpfd);

7
sys/src/cmd/sam/mesg.c
View file

@ -86,11 +86,12 @@ char *tname[] = {
void
journal(int out, char *s)
{
static int fd = 0;
static int fd = -1;
if(fd <= 0)
if(fd < 0)
fd = create("/tmp/sam.out", 1, 0666L);
fprint(fd, "%s%s\n", out? "out: " : "in: ", s);
if(fd >= 0)
fprint(fd, "%s%s\n", out? "out: " : "in: ", s);
}
void